Paper-feeding means for size-tubs



A. L. LITTLE AND G. W. VEROW.

PAPER FEEDWG MEANS FOR SIZE TUBS.

APPLICATION FILED J N. 4, 1921.

1,39Q,997, A PatentedSg'pt. 20, 1921.

2 SHEETS-SHEET I- m? @Yfizaul 2220 6 6e efifrow A. L. LITTLE AND G. w. VEROW.

PAPER FEEDING MEANS FOR SIZE TUBS.

APPLICATION FILED JAN. 4:. 1921.

Patented Sept. '20, 1921.

2 SHEETSSHEET 2.

. jizw 677ml UNITED STATES PAT ro -"icE.

ARTH R L. LITTLE AND snonenw. vnnow, or BREWER, MAINE, AssIsNonsjro EASTERN MANUFACTURING COMPANY, or nos'ron, massaontrsmrs, A son,-

POBATION OF MASSACHUSETTS.

' PAPER-FEEDING MEANS FOR SIZE-TUBS. v

Specification of Letters Patent.

To all whom it may concern;

Be it lmown that we, ARTHUR L. LIT LE and GEORGE W. VEnow, citizens of the United States, residin at Brewer, in the county of Penobscot an State of ,Maine, have invented new and useful Improvements in Paper-Feeding Means for Size-Tubs, of which the following is a specification.

This invention has relation broadly to tub sizing paper.

In the process of tub sizing paper, it has been customary to pass the sheet of paper from the initial drier through a bath of sizing material, and then to pass the sheet through a second drier or drier section. The paper is fed through these instrumentalities at high speed, approximately 265 feet a minute, and the machine tenders have to be very expert in order to pass the end of a sheet from the first drier through the tub sizin a aratus to the second drier on account of the high speed at which these several instrumentalities are operated. On account of the width of the sheet of paper and of the necessity of guiding the paper without lateral deviation as it passes from one instrumentality to the other, it is customary to form on the end of the sheet what is known as a tail, namely a relatively narrow marginal strip, the remainder of the sheet being cut or torn away, so that the ma-' chine tender by grasping this tail is able to present it to the succeeding instrumentalities near theends of the rolls by which it is gripped. The sheet must be thus tailed, asit were, because of the impossibility of pre-, senting the entire width of the sheet to the several instrumentalities without tearing or otherwise forming plaits or wrinkles. It is practically impossible for the machine tenders to handle the end of the web when tender would cause the crushing of his hand and. arm, and has at times causedthe oflife. v a y The object of the present invention isto Patented Sept. so, 1921;.

provide means by which the paper maybe;

passed through the tub sizing-apparatus accurately and without danger to the machine,-

tender. H y

The tubsizingiapparatus comprises ordinarily'a tank or tub in which the liquid size is contained, and through which the paper is caused to travel, and squeeze rolls between which the paperispassed for the purpose of ex ressing therefrom the surplus size.

n accordance with our invention,- the sizing machine is provided with a carrier Whlch cooperates with .at' least one of the squeeze rolls for the purpose of receiving the tail on the on-coming sheet and carry-e ing it to apoint where it will be gripped by the nip of the rolls. r a 7 On the accompanying -drawings,-- I Figure 1 represents more or lessdiagrammatically the dry end of a paper machine, a

sizing apparatus, and the jendof the drier to whichthe paper is subjectedafter passin through the tub. I l Q I ig. 2 represents on a larger scale the tub s1z1ng apparatus 1 I Fig. 3 represents a plan view of one end thereof.-

Fig. 4 illustrates the end of an sheet on whicha tail is formed to enablfi it to be passed from the paper machine through the sizing apparatus to the final drier -or second stack. 1 I

It will be understood that thedrawings. are more or less'conventional and diagram-. matic, thatthe phraseology which is herein employed is for the purpose of description rather than of limitation, and thatvarious changes may be made *in the-apparatus as herein described without departing from the spirit and scope of the invention as defined in the claims. 1 Referring to Fig. 1, A indicates the dry end of a paper machine and includes the necessary drying rolls and drier felts which are ordinarily employed for removing from the initially formed sheet a predetermined amount of the, moisture therein contained, so that the sheet-is capable of sustaining its own weight in its passage from thefisai'd dry end to the sizing tub'or sizingapparatus. B indicates conventionally the end poron-coming frames 11; and it is so formed as to contain a bath of the liquid size which it is desired to use. The bottom of the tub com rises the horizontalwall 11 and the incline Wall 12. Ordinarily such a tank or tub is provided with a "vertical cross partition 13 dividing the tub into the main compartment 14 and an overflow compartment 15. The usual squeeze or press rolls are indicated at 16, '17, which aresiinilar to those'ordinarily employed and which areia'rranged over'the tub, with the lower'portion of the roll 16 dipping into the bath contained'in the'tub. The top roll 17 isadju-stable by the ordinary means not shown. As thus far described, the sizing apparatus does not differ from those ordinarily in 'use, being provided as usual with the guide roll 18 under which thefsheet passes for immersion in the bath, and the guide roll 19 over which the sheet is passed on its wa to the seconddrier or stack.

eretofore, with an apparatus as thus far described, at least two men have been necessarytotransfer the end-0f a sheet of paper from the first drier A throu 'h the sizing apparatusto the second drier 'When' the on eoming endof'the sheetof paper reaches the end of the first drier, the attendant usu ally by'mean's of a knife slits one side edge to form on the sheet a a tail 6, as shownfin- Figl 4, removing and throwing 1 aside a greater portion of the body of the sheet whichha's'thus been slit. When the tail is of sufficient length, it is grasped-by-the attendant and thrust under the guide'roll 118 into'thetub. A second attendant reaches into the bath, grasps the tail, and drawing it under the lower squeeze roll 16 presents it to the nip of the rolls 16, 17 As he ac c'omplishes this, the first attendant runs from hispreviou's station to a point at which tions must be accomplished with great expe- 1 dition, for, as we have stated, it is ordinarily the practice to so operate the various instrumentalities that the sheet is traveling at rate of about 200 to 265 feetper minute,

" 265 feet being the apparent maximum at which the operators may work with safety. We have, provided the sizing apparatus with means" for receiving the tail of the has heretofore attended the presentation of .the tail of the sheet to the nip of the rolls.

, By reference to Figs. 2 and 3 of the draw ing, it will be noted that we have provided an endless belt which is indicated as a whole at 20. This belt is narrow in width, being only wide enough to receive the narrow tail along one side edge of the sheet of paper.

The belt is passed under guide'roll's 21, 22, which are immersed in the sizing solution or' compound in the tub, and the shafts of which are loosely journaled in suitable brackets as indicated at 23, 24, respectively. The upper V stretch of the belt engages the peripheral surface of the roll 16'for a considerable distance, and thence passesaround a. roll'25, the shaft 26 of which is journaled in brackets or frames 27'. This roll 25 islocated' between the rolls 16 and 17 and as close to the nip thereof as is possible according'to its diameter. the belt returns to the roll 21; The belt itself is preferably made of fabric or other equiva- After passing around the roll 25,

lent material which will frictionally engage A the tail-of the paper. The belt may be caused to move at the peripheral speed of the roll 16 by reason of its engagement with the roll,

but, if desired, it may be driven in addition by "a belt 28 passing around pulleys 30a'nd 31 secured to the roll 17 and the roll 25 re spectively, the pulleys 30 and 31 being of such relative diameter that thespeed of' travel'of the carrier belt 20 is equal to the peripheral speed of the lower squeeze roll" 16. Any suitable means may be employed-for tightening the carrier belt 20 so as to cause 7 it to press against the peripheral surfaceof the roll 16 during the operation ofcarrying the tail of the'paper through the. sizing apparatus. --It is rather desirable that. during the normal operation of the sizing ap'para tus, the carrier beltshould be released from the roll 16 so as to engage it only li-ghtl'y, and consequently the belt-tighteningmeans should be so constructed as to permit this result. If, under ordinary conditions, the

belt or carrier 20 presses too tightly against the roll 16,-the paper may bemarkedi A belt'tightener, which serves the purpose, is

illustrated on the drawing,

bar or cross shaft 34 the; ends ofwhi'ch are mounted in the frame or bracket 27; This belt-tightening roll may be swung from the position-shown in Fig. 2, at which' it bears: P

by gravity upon the vertical stretch of the carrier belt 20 so as to tighten the. belt and cause it to bear firmly against the squeeze roll-16,to"the position-shown in dotted 'lin'es at which the belt is permitted to become slack or loosen so as only slightly to engage the squeeze roll 16 or the paper which is passing therearound.

In threading the paper through the sizing apparatus, the attendant forms on the paper the usual tail 6, as shown in Fig. 4, and inserts the end under the roll 18 into the bath of sizing material, and grasping it carries it to a point where it will be gripped between the carrier belt 20 and the lower squeeze roll 16. The tail is then carried upwardly by the belt and the roll to a point where it is gripped by the nip of the rolls 16 and 17. .The machine tender, as the tail emerges between the rolls 16, 17 on the lefthand side in Fig. 2, is able to carry the tail over the guide roll 19 and present it to the second drier. By this apparatus, which we have thus described, it is possible for one attendant to thread or pass the paper from the in other words, several still narrower belts may be employed instead of a single belt as shown. The location of the various guide rolls for the carrier belt may be changed.

We have not attempted to illustrate in detail all of the various parts of the sizing apparatus, including means for heating the sizing material, as these are well known and Y in common use.

What we claim is':-- p 1. The combination with the first and second driers, and an intermediate sizing apparatus including squeeze rolls, of means for receiving the end of a sheet of paper and automatically carrying it under one of the squeeze rolls and presenting it to the nip of said rolls.

2. In a paper-sizing apparatus, the combination with a tank for containing the liquid sizing material and the squeeze rolls, of a carrier belt of adequate width to receive the tail at the end of an on-coming sheet of paper, and arranged to pass such tail under the lower squeeze roll and to present it to the nip ofthe squeeze rolls.

3. In a paper-sizing apparatus, the combination with a tank for containing the bath of liquid sizing material and upper and lower squeeze rolls for removing surplus size from the sheet,- of a carrier belt partially immersed in the bath and having a portion to track against the lower squeeze roll, and appropriate'guide rolls for said carrier belt, of which one is immersed in the receiving end of the tank and another is adjacent the nip of the squeeze rolls.

4. In a paper-sizing apparatus, the combination with a tank for containing the bath of liquid sizing material and upper and lower squeeze rolls for removing surplus size from the sheet, of a carrier belt partially immersed in the bath and having a portion to track against the lower squeeze roll, appropriate guide rolls for said carrier belt, of which one is immersed in the receiving end of the tank and another is adjacent the nip of the squeeze rolls, and manually-operated belt-tightening means for causing said carrier belt to engage the 7 said lower squeeze roll.

In testimony whereof we have afiixed our signatures.

ARTHUR L. LITTLE. GEORGE W. VEROW. 

